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Ingy döt Net 2023-07-01 11:58:00 -04:00
parent 7387c8f97b
commit cb5bb5e222
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Task/Knuth-shuffle/XPL0/knuth-shuffle.xpl0 Normal file
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proc Shuffle(Array, Items, BytesPerItem);
int Array, Items, BytesPerItem;
int I, J;
char Temp(8);
[for I:= Items-1 downto 1 do
[J:= Ran(I+1); \range [0..I]
CopyMem(Temp, Array+I*BytesPerItem, BytesPerItem);
CopyMem(Array+I*BytesPerItem, Array+J*BytesPerItem, BytesPerItem);
CopyMem(Array+J*BytesPerItem, Temp, BytesPerItem);
];
];
string 0; \use zero-terminated strings
int A; char B; real C;
int I;
[A:= [1, 2, 3, 4, 5];
Shuffle(A, 5, 4 \bytes per int\);
for I:= 0 to 5-1 do
[IntOut(0, A(I)); ChOut(0, ^ )];
CrLf(0);
B:= "12345";
Shuffle(B, 5, 1 \byte per char\);
for I:= 0 to 5-1 do
[ChOut(0, B(I)); ChOut(0, ^ )];
CrLf(0);
C:= [1., 2., 3., 4., 5.];
Shuffle(addr C(0), 5, 8 \bytes per real\);
for I:= 0 to 5-1 do
[RlOut(0, C(I)); ChOut(0, ^ )];
CrLf(0);
A:= [10];
Shuffle(A, 1, 4 \bytes per int\);
for I:= 0 to 1-1 do
[IntOut(0, A(I)); ChOut(0, ^ )];
CrLf(0);
]